Add PHPUnit to require-dev

Author: clue

.travis.yml

@@ -14,4 +14,4 @@ install:
   - composer install --no-interaction
 
 script:
-  - phpunit --coverage-text
+  - vendor/bin/phpunit --coverage-text

README.md

@@ -21,6 +21,7 @@ Async, event-driven and UTF-8 aware console input & output (STDIN, STDOUT), buil
     * [Stdin](#stdin)
 * [Pitfalls](#pitfalls)
 * [Install](#install)
+* [Tests](#tests)
 * [License](#license)
 * [More](#more)
 
@@ -554,6 +555,21 @@ $ composer require clue/stdio-react:^1.0
 
 More details and upgrade guides can be found in the [CHANGELOG](CHANGELOG.md).
 
+## Tests
+
+To run the test suite, you first need to clone this repo and then install all
+dependencies [through Composer](http://getcomposer.org):
+
+```bash
+$ composer install
+```
+
+To run the test suite, go to the project root and run:
+
+```bash
+$ php vendor/bin/phpunit
+```
+
 ## License
 
 MIT

composer.json

@@ -24,6 +24,7 @@
         "psr-4": { "Clue\\React\\Stdio\\": "src/" }
     },
     "require-dev": {
+        "phpunit/phpunit": "^4.8",
         "clue/commander": "^1.2",
         "clue/arguments": "^2.0"
     }